That particular post is very old and certainly there have been a number of changes in the Gallery which may make it no longer work. I'm assuming that's a slightly modified version of the Big and Tall avatar CSS, I'm not entirely sure. Certainly the only line there specific to the Gallery seems to be this:

That particular post is very old and certainly there have been a number of changes in the Gallery which may make it no longer work. I'm assuming that's a slightly modified version of the Big and Tall avatar CSS, I'm not entirely sure. Certainly the only line there specific to the Gallery seems to be this: